new file versioning policy and manager. be sure to add version_folder in your conf

code/utils/utils.py

@@ -29,6 +29,36 @@ def file_date_human(num):
     ).strftime(app.config['DATE_FORMAT'])
 
 
+def file_name_version(full_path):
+    """ New name versioned with date of the file  """
+    file_dir = os.path.dirname(full_path)
+    file_name = os.path.basename(full_path)
+    file_time =  os.stat(full_path).st_mtime
+    time_formatted = datetime.fromtimestamp(
+        file_time
+    ).strftime('%Y%m%d_%H%M%S')
+
+    new_name = '%s.%s'%(
+        time_formatted,
+        file_name
+    )
+    return new_name
+
+
+def version_date(full_path):
+    """ Date of versioned file  """
+    file_dir = os.path.dirname(full_path)
+    file_name = os.path.basename(full_path)
+    try:
+        return datetime.strptime(
+            file_name[0:15],
+            '%Y%m%d_%H%M%S'
+        )
+    except ValueError:
+        return None
+
+
+
 def file_stat(path, filename):
     full_path = os.path.join(path, filename)
     s = os.stat(full_path)
@@ -110,9 +140,12 @@ def is_valid_url(url, qualifying = None):
                 for qualifying_attr in qualifying])
 
 
-def iter_folder_files(path, recursive = True):
+def iter_folder_files(path, recursive = True, version_folder = None):
     if recursive:
         for dirpath, dirnames, filenames in os.walk(path, topdown = False):
+            path_list = dirpath.split(os.sep)
+            if path_list[-1] == version_folder:
+                continue
             relative_path = os.path.relpath(dirpath,path)
             dirnames.sort()
             if "/." in relative_path: